Bosch Greentherm T9800 SEO199 - Page 47

Problem solving
47
Greentherm T9800 SEO 160/199 | SECO 199 – 6 720 817 281 (2018/12)
E4 Air temperature inside cabinet above 176 °F
(80 °C) or 2 minutes above 158 °F (70 °C).
Appliance burner cut off to prevent overheating.
▶ Check for flue gas leakage inside the cabinet
1)
▶ Reset error (press and hold on/off button for 3
seconds).
If the problem persists:
▶ Check sensor resistance [18] (section 11) and
replace the sensor if it is not according to
specification.
1) 2)
E5 Condensing unit flue gases temperature above
428 °F (220 °C) or 2 minutes above 392 °F
(200 °C).
Appliance burner cut off to prevent overheating.
▶ Descale appliance ( section 7.3).
1)
▶ Reset error (press and hold on/off button for 3
seconds).
If the problem persists:
▶ Check sensor resistance [16] (section 11) and
replace the sensor if it is not according to
specification.
1) 2)
E7 Electronic control unit internal error. ▶ Reset error (press and hold on/off button for 3
seconds).
If the problem persists:
▶ Replace electronic control unit.
1)
E8 Error during ionization test. Electronic control unit
internal error.
▶ Replace electronic control unit.
1)
E9 Thermal fuse [13] broken. ▶ Replace thermal fuse.
1)
EA Ignition failure. ▶ Check gas inlet pressure ( section 4.13).
1)
▶ Perform gas and air tuning ( section 8.11).
1)
EB Electronic control unit internal error. ▶ Reset error (press and hold on/off button for 3
seconds).
If the problem persists:
▶ Replace electronic control unit.
1)
EC Flame lost during operation. ▶ Check gas inlet pressure ( section 4.13).
1)
▶ Perform gas and air tuning ( section 8.11).
1)
EE Gas valve modulation solenoid [7] disconnected. ▶ Check gas valve wire connection.
1)
If the problem persists:
▶ Replace the gas valve and/or wire connections and/
or electronic control unit. For gas valve replacement
perform gas and air tuning ( section 8.11).
1)
EF Wrong gas connected (LP instead of NG) for
current appliance configuration.
▶ Check gas type ( section 6.7).
1)
F2 Electronic control unit internal error. ▶ Reset error (press and hold on/off button for 3
seconds).
If the problem persists:
▶ Replace electronic control unit.
1)
F3 Electronic control unit internal error. ▶ Reset error (press and hold on/off button for 3
seconds).
If the problem persists:
▶ Replace electronic control unit.
1)
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